Implement mouse movement lock about gothicfreeaim HOT 8 CLOSED

Fix #20 and #1 by linear regression

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Fix #1, #2, #5, #9 implements stable version

The FX scripts are added and changed: Now the aiming FX is managed by
the spell and Wld_PlayEffect was removed. (See #5)

The focus vob is no set to the aim vod which is an oCItem. This works
very consistently now. (See #2)

The mouse is not really frame locked but rather scaled to the fps.
(See #1)

The mouse sensitivity issue seems to be resolved by #1. (See #9)

from gothicfreeaim.

Fix #1, #2, #5, #9 implements stable version

The FX scripts are added and changed: Now the aiming FX is managed by
the spell and Wld_PlayEffect was removed. (See #5)

The focus vob is no set to the aim vod which is an oCItem. This works
very consistently now. (See #2)

The mouse is not really frame locked but rather scaled to the fps.
(See #1)

The mouse sensitivity issue seems to be resolved by #1. (See #9)

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It does not help to hook the mouse movement directly.

These are the data collected in-game:

from gothicfreeaim.

The above works for high frame rates (IFI 6), but is to fast for low frame rates (IFI 30).
sigmoid(x*0.1)*0.1 might help, but first of all it's not ideal (does not start at zero) and secondly it is too complicated (I don't know if there exists a sigmoid function in gothic).

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This modifier must be adjusted and tested:

var int frameAdj; frameAdj = divf(MEM_Timer.frameTimeFloat, mkf(100)); // Adjust speed to fps (~= frame lock)
turnDeg = mulf(turnDeg, frameAdj);

from gothicfreeaim.

The modifier for different interframe intervals needs to be adjusted. (Lower frame-rate causes to fast movement at the moment).

from gothicfreeaim.

Either update the mouse at fixed intervals in the frame function/hook (not every iteration).

var int lastMouseUpdate;
const int mouseUpdateInterval = 50; // Time interval (ms) to update mouse
func void Spell_Invest_Blink(var int casterId) {
    if (MEM_Timer.totaltime > lastMouseUpdate + mouseUpdateInterval) {
        lastMouseUpdate = MEM_Timer.totaltime;
        if (!aimModifier) { aimModifier = FLOATEINS; };
        updateHeroYrot(aimModifier); // Outsourced since it might be useful for other spells/weapons as well (free aim)
    };
    // ...
};

Or create a separarte frame function for that.

// A little redunant but, aimModifier changes and needs to be updated before every call
func void updateMouse() {
    if (!aimModifier) { aimModifier = FLOATEINS; };
    updateHeroYrot(aimModifier); // Outsourced since it might be useful for other spells/weapons as well (free aim)
};

const int mouseUpdateInterval = 50; // Time interval (ms) to update mouse
func void Spell_Invest_Blink(var int casterId) {
    if (!FF_Active(updateHeroYrot) { FF_ApplyExt(updateMouse, mouseUpdateInterval, -1);
    // ...
};

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